Salmon in Aquaponics?

Portable Farms just announced a "Salmon Aquaponics System" - (portablefarm dot com slash farm2011 slash salmon-aquaponics). I'm pretty surprised by this as I thought salmon were salt-water fish. The entire web page just talks about dealing with temperature differentials. Anyone have any idea what is going on here? Why wouldn't you just call that a Trout System?